Aluminium-solder.



- UN T D STATES PATENT OFFICE.

"WILLIAM H. FINFBOCK. or CHICAGO, ILLINOlS.

A UMINI M-semen.

I I l specification of Letters Patent. Application filed November 9, 1907. Serial No. 401,482.

Patented Oct. 20, 1908.

. To all whom it may concern: I

' Be it known that-I, WILIJIAH H. FINFROOK,' a citizen of'the United States, residin Y at Chicago, in the county of Cook",and tate of Illinois, have invented certain new and usef'ul Improvements in AluminiurmSolder; and

I do hereby. declare the following to be, a full, clear, and exact description of the in- 'vention, such as will enable others skilledin the art to which it appertainsto make and use the same.

.' aluminium solder, two aluminium parts or one part of alummiinvention relates to what is known-as that is, solder for uniting um with one part of another metal.

The objects I have in view are toproduce an aluminium solder which is. thoroughly will and ninety-five 'melts as soon as it comes in contact with practical and commercially valuable because it can be melted at a comparatively low temperature and when applied to make a joint is so strong that one of the parts of metal themselves will break before the solder iive Way. I 1 T e invention consists ofthe compound of ingredients and method of preparing the samehereinafter described and specified in the claims.

heated zinc. The mass 1s then taken off the fire and poured into molds ready for use.

of five per cent. phosphorus While I have found that the proportion herein specified, compounded as described, gives the best results, changes may be made without departing from the spirit of my invention or sacrificing the advantages thereof.

proportion nor the precise method of preparing the'solder.

It has been demonstrated by very severe tests that my solder will melt readily and form a joint whichisso strong that the at the joint. The parts to be united are usually heated by means of-a torch or blow pipe and the solder applied under said torch or blow pipe. for uniting parts of, aluminium, cast,1ron, wrought iron, brass or any other hard metals. It hasa great practical advantage over all aluminium sol ers which contain aluminium as one of their constituent parts ture.

I claim:-

compound of-zinc and phosphor-tin.

2 An aluminium solder consisting of a in the proportion of four ounces of zinc to one-half ounce of phosphontin said phosphor-tin consisting of 1 phorus and ninety-five per cent. tin.

In testimony whereof, I a'tfix my signature, in prese'nce of two witnesses.

Witnesses a GEO. A. HuromNsoN,

FRANK J. VEIHMEYER.

. because it will melt at a much lower tempera- 1. An aluminium solder. consisting of a compound of zinc and phosphor-tin mixed ve percent. phos-.

I, therefore, do not limit myself to the stated metal itself will break before it will separate v The solder is very effective WILLIAM H. riurnooir. T 

